Differences Between Federal and State Murder Charges in Illinois

If you or someone you love is facing serious homicide charges, it’s important to know the differences between federal and state murder charges in Illinois. State and federal agencies have very different levels of resources to investigate and prosecute crimes. Both state and federal courts prosecute and sentence murder offenses harshly. With serious offenses like murder, federal-level penalties are especially severe.

The majority of murder offenses are charged at the state level. However, there are cases where the federal government will charge these offenses, such as interstate offenses or offenses that occur on federal property like a national park. Knowing the difference between these charges can help you understand the importance of a strong defense.

Illinois First-Degree Murder Charges

Illinois law defines first-degree murder as killing another person without any lawful justification if any of the following apply to what caused the death:

1. The offender planned to kill or cause serious harm to the individual who died or another person, or they knew the acts they planned would cause someone’s death.
2. The offender knew that their plans had a high chance of death or great injury to a person.
3. The offender committed or tried to commit a forcible felony, besides second-degree murder, with or without the help of others, and during that offense or attempt to commit the offense a person died.

Illinois has a first-degree murder felony charge. Depending on the circumstances, this can result in a minimum of 20 years in prison up to life when aggravating factors apply. There is also a required three years of parole after a sentencing term.

First-Degree Murder at the Federal Level

Federal law defines first-degree murder as the illegal killing of another person when the offender has malice aforethought. First-degree murder includes murder committed by:

1. Lying in wait
2. Poison
3. Willful, purposeful, malicious, premeditated killing
4. Repeated torture or assault of a child or children
5. A premeditated design illegally and maliciously to cause the death of any other person

It also includes the commission of another specific crime or attempt to commit that crime, when that crime results in the death of another person. This includes the following criminal offenses:

1. Murder
2. Arson
3. Kidnapping
4. Child abuse
5. Escape
6. Treason
7. Espionage
8. Aggravated sexual abuse
9. Sexual abuse
10. Burglary
11. Robbery

This offense is penalized by death or life in prison.

Illinois Second-Degree Murder Charges

Second-degree murder under Illinois law happens when a person commits first-degree murder, but either of the following mitigating factors apply:

1. The offense is a crime of passion caused by serious provocation by the person who died or another person, and another person was killed in the attempt to kill the provoking person.
2. When the offense occurred, the individual believed the act would have been a justified homicide, but this wasn’t reasonable.

There are some limitations to what is considered serious provocation. No matter which mitigating factor applies, the alleged offender has the burden of proof to show that the factor applies to their case, while the prosecution still carries the burden of proof for first-degree murder and the absence of the mitigating factors following sufficient proof that it applies.

Second-degree murder is charged as a Class 1 felony in Illinois. It can lead to a minimum of four years of imprisonment, but as high as up to 30 years for extended terms. There is a two-year parole term.

Second-Degree Murder at the Federal Level

Unlike Illinois law, federal law considers any murder that does not meet the definition of first-degree murder to be second-degree murder. While in the state, mitigating factors have to be proven to charge second-degree murder, the factors that make the offense first-degree have to be proven at the federal level.

This offense results in any number of years in prison or life in prison.

FAQs

Is a Federal Charge Worse Than a State Charge?

Yes, a federal charge is generally worse than a state charge. Federal offenses tend to have more severe penalties compared to state offenses. Additionally, federal investigative agencies have more resources to investigate and charge offenses, so cases are usually stronger. This means that a defense against them has to be more effective.

What’s the Average Sentence for Murder in Illinois?

In Illinois, the average sentence for murder ranges from four years to life. A first-degree murder felony results in between 20 and 60 years of imprisonment. An extended term results in 60 to 100 years of imprisonment. The sentence can be natural life when certain circumstances apply. Second-degree murder in Illinois is a Class 1 felony, which results in between four and 20 years of imprisonment. An extended term leads to between 15 and 30 years of imprisonment.

What Makes a Murder Case Federal or State?

A murder case may be charged at the federal or state level, and is likely to be charged at the federal level if the offense occurred on federal land, like a military base or a federal prison. Murder may also be charged federally if the individual murdered was an employee in the federal justice system, if the offense occurred during a federal crime, or if the offense crosses state lines.

What Is the New Murder Law in Illinois?

As of mid-2026, there isn’t a new murder law in Illinois, but there is a proposed bill that could change the law soon. The bill would move the offense of felony murder from first-degree murder to its own type of homicide offense. Felony murder occurs when a homicide occurs during the commission of another forcible felony. The law would also alter the penalties for this offense to be between eight and 40 years of imprisonment.

Hire a Murder Lawyer You Can Rely On

In 2025, there were 619 homicide offenses reported in Illinois. If you’ve been charged with murder or another serious homicide offense, it is crucial that you hire a murder lawyer who will commit to your case.

At The Law Office of Jessica Koester, LLC, we have decades of experience in working for those charged with criminal offenses in state and federal courts. This includes the U.S. District Court for the Southern District of Illinois. We know how serious murder charges are, and we advocate to protect your future.

Jessica Koester is an Illinois murder attorney who is committed to her clients and helps them each step of the way. Contact our firm today.